In every row, column and every bold-bordered area, each digit from 1 to 9 occurs exactly once. The digits in two orthogonally adjacent cells may not be consecutive, nor may they be in a ratio of 2:1.
In every row, column and every bold-bordered area, each digit from 1 to 9 occurs exactly once. The digits in two orthogonally adjacent cells may not be consecutive, nor may they be in a ratio of 2:1.